:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #2d333d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #2f81f7;
  --accent-hover: #1f6feb;
  --danger: #da3633;
  --ok: #3fb950;
  --warn: #d29922;
  --radius: 10px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo { font-size: 30px; }
.brand h1 { margin: 0; font-size: 18px; }
.sub { margin: 2px 0 0; font-size: 12px; color: var(--text-dim); }

.pill {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.pill-idle { background: #30363d; color: var(--text-dim); }
.pill-busy { background: rgba(210,153,34,.15); color: var(--warn); }
.pill-live { background: rgba(63,185,80,.15); color: var(--ok); }
.pill-err  { background: rgba(218,54,51,.15); color: var(--danger); }

/* ---------- 设置面板 ---------- */
.panel {
  margin: 20px auto;
  width: min(720px, calc(100% - 32px));
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
}
.panel h2 { margin: 0 0 16px; font-size: 16px; }

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}
.form-grid label { font-size: 13px; color: var(--text-dim); margin-top: 6px; }

input[type="text"], input[type="password"], input[type="number"], select {
  width: 100%;
  padding: 10px 12px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
}
input:focus, select:focus { border-color: var(--accent); }

.key-row { display: flex; gap: 8px; }
.key-row input { flex: 1; }

.advanced { margin-top: 14px; }
.advanced summary { cursor: pointer; color: var(--text-dim); font-size: 13px; }
.adv-grid { display: grid; grid-template-columns: 1fr; gap: 8px; margin-top: 10px; }
.adv-grid label:not(.checkbox-row) { font-size: 13px; color: var(--text-dim); }

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px !important;
  color: var(--text) !important;
  cursor: pointer;
}
.checkbox-row input { accent-color: var(--accent); }

.setup-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
  flex-wrap: wrap;
}
.hint { font-size: 12px; color: var(--text-dim); }

.error-box {
  margin-top: 14px;
  padding: 10px 14px;
  background: rgba(218,54,51,.1);
  border: 1px solid rgba(218,54,51,.4);
  border-radius: 8px;
  color: #ff8182;
  font-size: 13px;
  white-space: pre-wrap;
}

/* ---------- 按钮 ---------- */
.btn {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .15s, border-color .15s;
}
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
  padding: 10px 20px;
}
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: transparent; border-color: var(--danger); color: #ff8182; }
.btn-danger:hover { background: rgba(218,54,51,.15); }
.btn-ghost { background: transparent; }

/* ---------- 控制栏 ---------- */
.controlbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
#urlBar { flex: 1; min-width: 200px; }
.spacer { flex: 1; }
.session-info { font-size: 12px; color: var(--text-dim); }

/* ---------- 屏幕 ---------- */
.screen-area {
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 16px;
  overflow: auto;
}
.screen-wrap {
  position: relative;
  max-width: 100%;
  outline: none;
}
#screen {
  display: block;
  max-width: 100%;
  height: auto;
  background: #000;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: default;
}
.screen-wrap.focused #screen { border-color: var(--accent); }

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: rgba(13,17,23,.85);
  color: var(--text-dim);
  font-size: 14px;
  border-radius: 6px;
}
.spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 底栏 ---------- */
.footer {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 20px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-dim);
}
.flex-spacer { flex: 1; }
.footer a { color: var(--text-dim); text-decoration: none; }
.footer a:hover { color: var(--accent); }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 13px;
  z-index: 100;
  max-width: min(560px, calc(100vw - 40px));
}
.toast.toast-error { border-color: var(--danger); color: #ff8182; }

@media (max-width: 640px) {
  .brand h1 { font-size: 15px; }
  .controlbar { padding: 8px; gap: 6px; }
  #urlBar { min-width: 140px; }
}

/* ============ 顶栏导航 ============ */
.topnav { display: flex; align-items: center; gap: 18px; }
.nav-link {
  background: none; border: none; padding: 4px 0;
  color: var(--text-dim); font-size: 13px; text-decoration: none;
  cursor: pointer; font-family: inherit;
}
.nav-link:hover { color: var(--accent); }

/* ============ 落地页 ============ */
.landing { width: min(1060px, calc(100% - 32px)); margin: 0 auto; padding: 48px 0 24px; }
.hero { text-align: center; }
.byok-badge {
  display: inline-block; padding: 5px 14px; border-radius: 999px;
  background: rgba(47,129,247,.12); border: 1px solid rgba(47,129,247,.4);
  color: #79c0ff; font-size: 12px; font-weight: 600; letter-spacing: .5px;
}
.hero h2 { margin: 18px 0 14px; font-size: clamp(28px, 5vw, 44px); line-height: 1.28; }
.hero p { max-width: 720px; margin: 0 auto; color: var(--text-dim); font-size: 15px; line-height: 1.85; }
.hero p strong { color: var(--text); }
.hero-actions { display: flex; justify-content: center; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.hero-note { font-size: 12px !important; margin-top: 14px !important; color: #6e7681 !important; }

.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn-outline { background: transparent; border-color: var(--accent); color: #79c0ff; }
.btn-outline:hover { background: rgba(47,129,247,.12); }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 48px; }
.step-card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 22px; position: relative;
}
.step-num { font-size: 13px; font-weight: 700; color: var(--accent); letter-spacing: 1px; }
.step-card h3 { margin: 10px 0 8px; font-size: 16px; }
.step-card p { margin: 0 0 14px; font-size: 13px; line-height: 1.7; color: var(--text-dim); }
.text-link { color: #79c0ff; font-size: 13px; text-decoration: none; }
.text-link:hover { text-decoration: underline; }
.text-link-btn { background: none; border: none; padding: 0; cursor: pointer; font-family: inherit; }

.trust-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 24px;
}
.trust-item { display: flex; align-items: flex-start; gap: 10px; padding: 14px; background: rgba(22,27,34,.6); border-radius: 8px; }
.trust-icon { font-size: 20px; }
.trust-item strong { display: block; font-size: 13px; }
.trust-item small { display: block; margin-top: 4px; font-size: 11px; color: var(--text-dim); line-height: 1.6; }

/* ============ 设置面板补充 ============ */
.h2-sub { font-size: 12px; font-weight: 400; color: var(--text-dim); margin-left: 8px; }
.label-row { display: flex; align-items: center; justify-content: space-between; }
.inline-link {
  background: none; border: none; color: #79c0ff; font-size: 12px;
  cursor: pointer; font-family: inherit; padding: 0;
}
.inline-link:hover { text-decoration: underline; }
.field-note { font-size: 12px; color: #6e7681; line-height: 1.6; margin: -2px 0 4px; }

/* ============ 工作原理 ============ */
.how { width: min(1060px, calc(100% - 32px)); margin: 24px auto 48px; }
.how h2 { font-size: 20px; margin-bottom: 20px; }
.flow {
  display: flex; align-items: center; justify-content: center; flex-wrap: wrap; gap: 10px;
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px 16px;
}
.flow-node {
  background: var(--panel-2); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 16px; text-align: center; min-width: 120px;
}
.flow-node span { display: block; font-size: 14px; font-weight: 600; }
.flow-node small { display: block; margin-top: 4px; font-size: 11px; color: var(--text-dim); }
.flow-arrow { color: var(--accent); font-size: 18px; }

.do-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 16px; }
.do-card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; }
.do-card h3 { margin: 0 0 12px; font-size: 15px; }
.do-card ul { margin: 0; padding-left: 18px; }
.do-card li { font-size: 13px; color: var(--text-dim); line-height: 1.9; }

.disclaimer {
  margin-top: 16px; padding: 16px 20px; border-left: 3px solid var(--warn);
  background: rgba(210,153,34,.06); border-radius: 0 8px 8px 0;
}
.disclaimer p { margin: 0 0 8px; font-size: 12px; line-height: 1.8; color: var(--text-dim); }
.disclaimer p:last-child { margin-bottom: 0; }
.disclaimer strong { color: var(--text); }

/* ============ 引导弹窗 ============ */
.modal {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(1,4,9,.75); display: flex; align-items: center; justify-content: center;
  padding: 20px; overflow: auto;
}
.modal-card {
  width: min(620px, 100%); max-height: calc(100vh - 40px); overflow: auto;
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 24px;
}
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.modal-head h2 { margin: 0; font-size: 18px; }
.guide-steps { margin: 0; padding-left: 22px; }
.guide-steps li { margin-bottom: 20px; font-size: 14px; }
.guide-steps li strong { font-size: 15px; }
.guide-steps li p { margin: 6px 0 10px; font-size: 13px; color: var(--text-dim); line-height: 1.75; }
.guide-warn {
  padding: 12px 14px; border-radius: 8px; font-size: 12px; line-height: 1.75;
  background: rgba(210,153,34,.1); border: 1px solid rgba(210,153,34,.35); color: #e3b341;
}
.modal-foot { margin-top: 18px; display: flex; justify-content: flex-end; }

/* 小屏才收成单列；手机横屏与平板仍保持多列紧凑布局 */
@media (max-width: 900px) {
  .topnav { display: none; }
}
@media (max-width: 640px) {
  .steps, .trust-row, .do-grid { grid-template-columns: 1fr; }
  .landing { padding: 32px 0 16px; }
}

/* ============ 顶栏账户区 ============ */
.topbar-right { display: flex; align-items: center; gap: 12px; margin-left: auto; }
.mode-badge {
  padding: 3px 10px; border-radius: 999px; font-size: 11px;
  background: rgba(210,153,34,.12); border: 1px solid rgba(210,153,34,.4); color: var(--warn);
}
.auth-area { position: relative; }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.user-btn {
  padding: 6px 12px; background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px; font-size: 12px;
  cursor: pointer; font-family: inherit; white-space: nowrap;
}
.user-btn:hover { border-color: var(--accent); }
.user-menu {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 150;
  min-width: 210px; background: var(--panel); border: 1px solid var(--border);
  border-radius: 10px; padding: 6px; box-shadow: 0 12px 32px rgba(0,0,0,.5);
}
.user-menu-head { padding: 10px 12px; border-bottom: 1px solid var(--border); margin-bottom: 6px; }
.user-menu-head strong { display: block; font-size: 13px; }
.user-menu-head small { display: block; margin-top: 3px; font-size: 11px; color: var(--text-dim); }
.user-menu button {
  display: block; width: 100%; text-align: left; padding: 9px 12px;
  background: none; border: none; border-radius: 6px; color: var(--text);
  font-size: 13px; cursor: pointer; font-family: inherit;
}
.user-menu button:hover { background: var(--panel-2); }
.user-menu .danger-text { color: #ff8182; }

/* ============ 账户卡片 ============ */
.account-box {
  display: flex; align-items: center; gap: 14px; padding: 14px 16px; margin-bottom: 16px;
  background: rgba(47,129,247,.07); border: 1px solid rgba(47,129,247,.35); border-radius: 10px;
}
.account-avatar {
  width: 40px; height: 40px; flex: none; display: grid; place-items: center;
  background: var(--panel-2); border-radius: 50%; font-size: 20px;
}
.account-info { flex: 1; min-width: 0; }
.account-info strong { display: block; font-size: 14px; }
.key-state { display: block; margin-top: 3px; font-size: 12px; color: var(--ok); }
.key-state.missing { color: var(--warn); }
.account-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ============ 认证弹窗 ============ */
.modal-sm { width: min(430px, 100%); }
.auth-tabs { display: flex; gap: 6px; margin-bottom: 18px; border-bottom: 1px solid var(--border); }
.auth-tab {
  flex: 1; padding: 9px; background: none; border: none; border-bottom: 2px solid transparent;
  color: var(--text-dim); font-size: 14px; cursor: pointer; font-family: inherit;
}
.auth-tab.active { color: #79c0ff; border-bottom-color: var(--accent); font-weight: 600; }
.auth-form label { display: block; margin: 12px 0 6px; font-size: 12px; color: var(--text-dim); }
.auth-form > input { width: 100%; }
.btn-block { width: 100%; margin-top: 18px; padding: 11px; }
.auth-note { margin: 14px 0 0; font-size: 11px; line-height: 1.7; color: var(--text-dim); }
.key-desc { margin: 0 0 6px; font-size: 12px; line-height: 1.7; color: var(--text-dim); }

/* ============ 手机竖屏旋转提示 ============ */
.rotate-overlay {
  position: fixed; inset: 0; z-index: 300; background: #0d1117;
  display: flex; align-items: center; justify-content: center; padding: 24px; text-align: center;
}
.rotate-inner { max-width: 340px; }
.rotate-icon { font-size: 54px; line-height: 1; }
.rotate-icon span { font-size: 32px; color: var(--accent); margin-left: 6px; }
.rotate-inner h2 { margin: 20px 0 10px; font-size: 22px; }
.rotate-inner p { margin: 0 0 24px; font-size: 13px; line-height: 1.8; color: var(--text-dim); }
.rotate-inner .btn { display: block; width: 100%; margin-bottom: 10px; padding: 12px; }

/* ============ 平板适配 (768–1200px) ============ */
@media (min-width: 768px) and (max-width: 1200px) {
  .landing, .how { width: calc(100% - 40px); }
  .trust-row { grid-template-columns: repeat(2, 1fr); }
  .steps { gap: 12px; }
  .step-card { padding: 18px; }
  .controlbar { gap: 6px; }
  .controlbar .btn { padding: 7px 10px; }
}

/* ============ 手机横屏 / 小高度设备（沉浸式桌面浏览器视图） ============ */
@media (max-height: 560px) and (orientation: landscape) {
  .topbar { padding: 6px 12px; }
  .brand .sub { display: none; }
  .brand h1 { font-size: 14px; }
  .logo { font-size: 20px; }
  .topnav { display: none; }
  .footer { display: none; }
  .controlbar { padding: 4px 8px; gap: 4px; flex-wrap: nowrap; }
  .controlbar .btn { padding: 4px 8px; font-size: 11px; }
  #urlBar { padding: 5px 8px; font-size: 12px; min-width: 100px; }
  .session-info { display: none; }
  .screen-area { padding: 4px 8px; }
  #screen { max-height: calc(100vh - 84px); width: auto; max-width: 100%; object-fit: contain; }
  .landing { padding: 20px 0 12px; }
  .hero h2 { font-size: 24px; margin: 10px 0 8px; }
  .hero p { font-size: 12px; line-height: 1.6; }
  .hero-note { display: none; }
  .hero-actions { margin-top: 12px; }
  .btn-lg { padding: 8px 16px; font-size: 13px; }
  .steps { margin-top: 20px; gap: 10px; grid-template-columns: repeat(3, 1fr); }
  .step-card { padding: 12px; }
  .step-card h3 { font-size: 13px; margin: 6px 0 4px; }
  .step-card p { font-size: 11px; margin-bottom: 8px; line-height: 1.5; }
  .trust-row { margin-top: 12px; gap: 8px; grid-template-columns: repeat(2, 1fr); }
  .trust-item { padding: 8px; }
  .trust-item small { display: none; }
  .do-grid { grid-template-columns: repeat(2, 1fr); }
  .how { margin-bottom: 20px; }
  .flow { padding: 12px; gap: 6px; }
  .flow-node { padding: 6px 10px; min-width: 90px; }
  .panel { margin: 12px auto; padding: 14px 18px; }
  .modal-card { padding: 16px; }
}

/* ============ 手机竖屏（用户选择继续浏览时） ============ */
@media (max-width: 640px) and (orientation: portrait) {
  .topbar { flex-wrap: wrap; gap: 8px; padding: 10px 12px; }
  .topbar-right { width: 100%; justify-content: flex-end; flex-wrap: wrap; }
  .brand .sub { display: none; }
  .hero h2 { font-size: 26px; }
  .hero p { font-size: 13px; }
  .controlbar { padding: 6px 8px; gap: 5px; }
  .controlbar .btn { padding: 6px 9px; font-size: 11px; }
  #urlBar { min-width: 100%; order: 5; }
  .session-info { display: none; }
  .footer-note { display: none; }
  .account-box { flex-wrap: wrap; }
  .account-actions { width: 100%; }
  .account-actions .btn { flex: 1; }
}